Fire cr heat-closing valve



Jan. 12, 1932. R KRAFT FIRE 0R HEAT CLOSING VALVE Filed May 26, 1930 INVENTOR, Rum/l E Kraft,

ATTORNEY.

Patented Jan; 12, 1932 RUSSELL E. KRAFT, OF SPRIHGFI- ZD, TEASSACEUSELTS FIRE OR HEAT-GLOSING VALVE Application filed May 28, 1930. Serial No.

This invention relates to improvements in valves of the type that are automatically operated at a undetermined temperturc, in

- case'of fire, or excessive heat, and the object 5 of my improvements is to provide a simply controlled, dependable, shut-oil, or valve, the purpose of shutting oil the ilow of water,

gas, oil, or other "supplies leading into a building, where fire or an excess've heat occurs. Oftentimes, explosions of gas occur,

because the flow isnot shut off, and also damfrom water. means of the construction illustrated in the accompanying drawings, in which 7 5 ,Fig. 1 is a plan view in section, taken on line l1 of Fig. 8,showing plug and COllGCl spring in wound-up condition.

' Fig. 2 is vertical sectional View, partly in elevation, and

Fig. 3 is vertical sectional view on the line3-3of Fig. 2 showing tl e spring retaining means and the valve open.

imilar numerals refer to similar parts throughout the several views.

The valve body 1 is formed with an ioning 1 to receive and support the tapered shut- I olf plug 2, which is adjustable vertically, by means of the nut 3 and washer 3 and the head. 4 on which a wrench may be applied. The valve body is formed with an integral extended portion 5 to provide an opening 6 at its top; this opening being closed after the assembly of the parts by the cover plate 7 and cap screws 7. The plug 2 is formed 35 with an'integral and extended portion 8 at the top and of smaller diameter than the upper portion of the main plug 2 for forming the shoulder 9, upon which rests the coil spring 10 in the opening 6. The coil spring 10 is mounted with a bent end 10 firmly secured to the valve body 1, in a recess at 11, by means of the lock screw 12, and the other end 10 is inserted in a recess 13 in the part 8 oi 'the plug 2. In the upper part of the recess 13is inserted one end 14 of the spring retaining or look bar 15, both loch bar and end 10 of the-coil spring 10 being held in place with the lock 'orset screw 16, as shown. The opposite end of-the lock bar 15 is formed with an inclined camined surface 17. En

l attain these obiects by i is other, or upper edge, enga shaped iranie 21, mounted :l to the cover plate 7. The u; 1511 9 s threaded, and

v mounted thereon, its sted'by the nut 23. A stop i s cured to the covu 7 to retain and position the plug in a closed position at)() from its normally open position against the 'tensioof the coil s ring 10.

in operation, it is apparent that, when 0X- cesive heat, or fire, melts the fusible plate 20, the sprin retaining or look bar 15 will be released b the double or combined action the coil spring 10, the expansion spring 22 a inclined surfaces 17 and 18; D i ill immediately and quickly turn the and close the valve. The stop 24 will now be engaged by the spring retaining bar 15. The valve is re-sct in its normally open position by applying a wrench on the part lto rotate the plug into its normally open position. The lock pin 19 is depressed into engagement with the bar 15 against the tension of the spring 22. The fusible member 20 is now inserted or put in place.

What I claim is:

1. An automatically operated shut-off valve comprising a body, a shutoff plug therein, a spring attached to the plug and to the body, a lock bar attached to the plug, a pin engaging the lock bar to retain the valve open and the spring under tension, 21 d a fusible member engaging the pin and exposed to the surrounding temperature for releasing the pin and bar at a high temperature, as described.

2. A valve, for the purpose described, comprising a body having a plug receiving opening, a shut-oil plug in the opening, a coil. spring attached to the plug and to the body respectively, a lock bar attached to the plu a spring actuated pin engaging the lock bar p iting the coil spr n 10 w to hold the plug in open position, inclined cooperating surfaces between the lock bar and pin, a valve cover, a frame on the valve cover,

" a fusible member or plate inserted between the pin and the frame, the spring actuated pin operating against the fusible member to release the pin from its engagementrwith the lock bar, When the fusible member melts, and a stop to'retain the shut-off plug in its closed position against the tension of the spring, as described. I

3. An emergency valve, for the purpose described, comprising a body member having a valve receiving opening, a valve therein, means for retaining the valve in its normally open position and for permitting it to automatically close at a predetermined temperature comprising a spring secured to the valve and body member for closing the valve, a bar With an inclined surface connected to the valve, a pin having an inclined surface engaging the said surface of the bar, a fusible member for retaining the said surfaces in contact, which, When it melts, releases the pin and'bar and permits the spring to turn the valve into its closed position.

. In testimony hereof, I have subscribed my name this 14th day of May, 1930.

' RUSSELL E. KRAFT. 

